Display panel and display device

Abstract

A display panel and a display device are provided to improve the problems of color mixing and light leakage of the display panel. The display panel comprises a light-emitting substrate, a color film layer disposed on the light-emitting side of the light-emitting substrate, a light-transmitting functional layer, and a light-absorbing layer. The color film layer comprises a plurality of light filtering units. The light-transmitting functional layer is located on the surface of the color film layer away from the light-emitting substrate, and the light-transmitting functional layer at least partially overlaps the light-emitting substrate with the orthographic projection of at least one light filtering unit. The light-absorbing layer is located on the surface of the light-transmitting functional layer away from the color film layer, and the light-absorbing layer covers the gap between at least two adjacent light filtering units.

Description

Technical Field

[0001] This article relates to, but is not limited to, the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] Light-emitting diodes (LEDs) are widely used in various fields such as indicators, decorations, automotive lighting, and augmented reality (AR) applications—products requiring high brightness and often operating in harsh outdoor environments—due to their advantages including high brightness, high reliability, adjustable color temperature, environmental friendliness, long lifespan, and low power consumption. Organic light-emitting diodes (OLEDs) and quantum dot light-emitting diodes (QLEDs) are active-matrix display devices, offering advantages such as self-illumination, wide viewing angle, high contrast, low power consumption, extremely high response speed, thinness, flexibility, and low cost. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] This application provides a display panel and a display device.

[0005] On one hand, this embodiment provides a display panel, including: a light-emitting substrate, a color filter layer disposed on the light-emitting side of the light-emitting substrate, a light-transmitting functional layer, and a light-absorbing layer. The color filter layer includes a plurality of filter units. The light-transmitting functional layer is located on the surface of the color filter layer away from the light-emitting substrate, and the orthographic projection of the light-transmitting functional layer on the light-emitting substrate at least partially overlaps with the orthographic projection of at least one filter unit on the light-emitting substrate. The light-absorbing layer is located on the surface of the light-transmitting functional layer away from the color filter layer, and the light-absorbing layer covers the gap between at least two adjacent filter units.

[0006] In some exemplary embodiments, the light-transmitting functional layer is disposed within a groove formed by the spacing between adjacent filter units of the color filter layer.

[0007] In some exemplary embodiments, the orthogonal projection of the light-absorbing layer onto the light-emitting substrate is located within the orthogonal projection range of the light-transmitting functional layer onto the light-emitting substrate.

[0008] In some exemplary embodiments, the filter unit includes: a first surface close to the light-emitting substrate, a second surface away from the light-emitting substrate, and a sidewall connected between the first surface and the second surface, wherein the orthographic projection of the first surface onto the light-emitting substrate includes the orthographic projections of the second surface and the sidewall onto the light-emitting substrate.

[0009] In some exemplary embodiments, the orthographic projection of the light-absorbing layer onto the light-emitting substrate does not overlap with the orthographic projection of the second surface of the filter unit onto the light-emitting substrate.

[0010] In some exemplary embodiments, the light-transmitting functional layer is not in contact with the second surface of at least one filter unit.

[0011] In some exemplary embodiments, the light-transmitting functional layer covers the second surface and sidewalls of at least one filter unit.

[0012] In some exemplary embodiments, in a first cross-section perpendicular to the plane where the light-emitting substrate is located, the sidewall of at least one filter unit includes: a first sidewall and a second sidewall connecting the first surface and the second surface, the first sidewall having a first angle with the first surface, the second sidewall having a second angle with the first surface, and the first angle being greater than or equal to the second angle.

[0013] In some exemplary embodiments, the first profile passes through the geometric center of the filter unit.

[0014] In some exemplary embodiments, at least one of the first included angle and the second included angle is 90 degrees.

[0015] In some exemplary embodiments, the thicknesses of the filter units with different light transmission colors are at least partially the same, or all different; the thickness of the filter unit is the minimum distance between the first and second surfaces of the filter unit.

[0016] In some exemplary embodiments, the plurality of filter units include: a first filter unit that transmits red light, a second filter unit that transmits green light, and a third filter unit that transmits blue light; the thickness of the second filter unit is less than the thickness of the first filter unit and less than the thickness of the third filter unit.

[0017] In some exemplary embodiments, the first included angle of the first filter unit and the first included angle of the third filter unit are close to the second filter unit, and the first included angle of the second filter unit is the same size as the second included angle of the second filter unit.

[0018] In some exemplary embodiments, the display panel further includes a lens layer located on the side of the light-absorbing layer away from the light-transmitting functional layer, the lens layer including a plurality of lens units, wherein the orthographic projection of at least one of the plurality of lens units on the light-emitting substrate overlaps with the orthographic projection of at least one filter unit on the light-emitting substrate.

[0019] In some exemplary embodiments, the light-emitting substrate includes: a driving backplate and a plurality of light-emitting elements; the plurality of light-emitting elements are located between the driving backplate and the color filter layer; the orthographic projection of a light-emitting element on the driving backplate overlaps with the orthographic projection of a filter unit on the driving backplate.

[0020] In some exemplary embodiments, the driving backplane is a silicon-based substrate that integrates multiple pixel circuits, which are electrically connected to the multiple light-emitting elements.

[0021] In some exemplary embodiments, the material of the light-transmitting functional layer includes at least one of the following: organic phosphorescent gain material, organic phosphorescent emitting material; the material of the light-absorbing layer includes at least one of the following: conjugated organic polymer, blue organic light-emitting diode material.

[0022] On the other hand, this embodiment provides a display device, including the display panel as described above.

[0023] On the other hand, this embodiment provides a display panel, including: a light-emitting substrate and a color filter layer disposed on the light-emitting side of the light-emitting substrate. The color filter layer includes a plurality of filter units, each filter unit including: a first surface close to the light-emitting substrate, a second surface away from the light-emitting substrate, and a sidewall connecting the first surface and the second surface. The angle between the sidewall and the first surface is less than or equal to 90 degrees. The filter units with different light-transmitting colors have at least partially the same thickness, or all different thicknesses. The thickness of the filter unit is the minimum distance between the first surface and the second surface of the filter unit.

[0024] In some exemplary embodiments, the multiple filter units of the color filter layer include: a first filter unit that transmits red light, a second filter unit that transmits green light, and a third filter unit that transmits blue light; the thickness of the second filter unit is less than the thickness of the first filter unit and less than the thickness of the third filter unit.

[0025] In some exemplary embodiments, in a first cross-section perpendicular to the plane where the light-emitting substrate is located, the sidewall of at least one filter unit includes: a first sidewall and a second sidewall connecting the first surface and the second surface, the first sidewall having a first angle with the first surface, the second sidewall having a second angle with the first surface, and the first angle being greater than or equal to the second angle.

[0026] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the embodiments described in the description and the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0028] Figure 1 This is a planar schematic diagram of the color filter layer of a display panel; Figure 2 This is a plan view of the color filter layer of a display panel according to at least one embodiment of the present disclosure; Figure 3 for Figure 2 A partial cross-sectional view along the QQ' direction; Figure 4 This is a partial cross-sectional schematic diagram of a display panel according to at least one embodiment of the present disclosure; Figure 5 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure; Figure 6 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure; Figure 7 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure; Figure 8 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure; Figure 9 This is a schematic diagram of a display device according to at least one embodiment of the present disclosure. Detailed Implementation

[0029] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. The implementation can be carried out in many different forms. Those skilled in the art will readily understand that the methods and content can be transformed into other forms without departing from the spirit and scope of this disclosure. Therefore, this disclosure should not be construed as limited to the content described in the following embodiments. Without conflict, the embodiments and features in the embodiments of this disclosure can be arbitrarily combined with each other.

[0030] In the accompanying drawings, the size of one or more constituent elements, the thickness of layers, or areas are sometimes exaggerated for clarity. Therefore, this disclosure is not necessarily limited to these dimensions, and the shape and size of one or more parts in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0031] The ordinal numbers such as "first," "second," and "third" used in this specification are used to avoid confusion among the constituent elements, not to limit the quantity. The term "multiple" in this disclosure refers to two or more quantities.

[0032] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of the constituent elements being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0033] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "coupling" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or link; a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the meaning of these terms in this disclosure as appropriate. "Connection" can include "electrical connection," which can include situations where constituent elements are connected together by a component having some electrical function. There are no particular limitations on the term "component having some electrical function," as long as it allows for the transmission of electrical signals between the connected constituent elements. Examples of "component having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other multifunctional components.

[0034] In this specification, a transistor is a device that includes at least three terminals: a gate (gate electrode), a drain, and a source. A transistor has a channel region between its drain (drain electrode terminal, drain region, or drain electrode) and its source (source electrode terminal, source region, or source electrode), and current can flow through the drain, the channel region, and the source. In this specification, the channel region refers to the region through which current primarily flows.

[0035] In this specification, the first terminal can be the drain and the second terminal can be the source, or vice versa. Additionally, the gate can also be called the control terminal. In cases where transistors with opposite polarities are used or where the current direction changes during circuit operation, the functions of the "source" and "drain" are sometimes interchanged. Therefore, in this specification, the "source" and "drain" can be interchanged.

[0036] In this specification, "approximately" and "about" mean without strictly defined limits, allowing for errors in the process and measurement. In this disclosure, "same" includes values ​​differing by less than 10%, such as values ​​differing by less than 5%.

[0037] In this disclosure, "A extends along direction B" means that A may include a main part and a secondary part connected to the main part. The main part is a line, line segment, or strip-shaped solid. The main part extends along direction B, and the length of the main part extending along direction B is greater than the length of the secondary part extending along other directions. In this disclosure, "A extends along direction B" refers to "the main part of A extends along direction B".

[0038] The phrase "A and B are arranged in the same layer" in this disclosure means that A and B are formed simultaneously through the same patterning process, or that the surfaces of A and B closest to the substrate are at substantially the same distance from the substrate, or that the surfaces of A and B closest to the substrate are in direct contact with the same film layer. "The orthographic projection of A includes the orthographic projection of B" means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or that the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B. The phrase "the shape of A" in this disclosure refers to the shape of the orthographic projection of A onto the substrate.

[0039] In traditional OLED display panels, the color film (CF) is a key component for image display. Its main function is to decompose the light emitted by the OLED into red, green, and blue to generate a color image. However, gaps and poor overlap in the color film layer can cause different colors of light to mix, affecting the color purity and display effect of the image. Moreover, gaps can also cause light leakage, which not only reduces the brightness of the display panel but also causes color inaccuracies.

[0040] Figure 1 This is a planar schematic diagram of the color filter layer of a display panel. In some examples, such as... Figure 1 As shown, the color filter layer may include multiple filter units 210, and the orthographic projection shape of the filter unit 210 may be approximately hexagonal. Figure 1As shown in Figure (a), adjacent filter units 210 can overlap tightly. However, in the circled area S1 of Figure (a), adjacent filter units 210 exhibit poor overlap, resulting in tiny gaps due to incomplete overlap. Figure 1 As shown in Figure (b), there is a gap between adjacent filter units 210, as shown in the circled area S2 in Figure (b).

[0041] This embodiment provides a display panel and display device that can improve display problems caused by gaps and poor overlap of the color filter layer, thereby improving the color purity of the image, color accuracy, and brightness uniformity.

[0042] This embodiment provides a display panel, including: a light-emitting substrate, a color filter layer disposed on the light-emitting side of the light-emitting substrate, a light-transmitting functional layer, and a light-absorbing layer. The color filter layer includes a plurality of filter units. The light-transmitting functional layer is located on the surface of the color filter layer away from the light-emitting substrate, and the orthographic projection of the light-transmitting functional layer onto the light-emitting substrate at least partially overlaps with the orthographic projection of at least one filter unit onto the light-emitting substrate. The light-absorbing layer is located on the surface of the light-transmitting functional layer away from the color filter layer, and the light-absorbing layer covers the gap between at least two adjacent filter units. In some examples, the orthographic projection of the light-transmitting functional layer onto the light-emitting substrate may include the orthographic projections of multiple filter units onto the light-emitting substrate; in other examples, the orthographic projection of the light-transmitting functional layer onto the light-emitting substrate may partially overlap with the orthographic projections of the filter units onto the light-emitting substrate.

[0043] The display panel provided in this embodiment can effectively block stray light and reduce color crosstalk by setting a light-transmitting functional layer and a light-absorbing layer on the surface of the color filter layer away from the light-emitting substrate, thereby improving the color purity of the image and enhancing color accuracy and brightness uniformity.

[0044] In some exemplary embodiments, a light-transmitting functional layer can be disposed within a groove formed by the spacing between adjacent filter units of the color filter layer. The display panel of this example disposes of a light-transmitting functional layer within the groove between filter units to reduce light leakage and color crosstalk. Traditional color filter layer structures typically utilize a black matrix (BM) within the spacing between filter units to reduce light leakage and color crosstalk. However, using a black matrix structure occupies additional space and reduces the aperture ratio, while also increasing material waste and manufacturing costs. Compared to traditional structures, the display panel of this example does not require the additional fabrication of a black matrix. By optimizing the structure of the color filter layer, the light-transmitting functional layer and light-absorbing layer are directly disposed on the surface of the filter units and within the gaps between the filter units. This not only improves the aperture ratio but also reduces material waste during manufacturing, lowers overall costs, and maintains better optical performance. Furthermore, in some implementations, in silicon-based OLED display panels, metal grids are typically used to fix the color filter layer, but their presence can lead to a screen-door effect, affecting the transparency and light transmittance of the display panel. This example uses a light-transmitting functional layer instead of a black matrix, directly replacing the function of a metal grid and thus avoiding the screen-door effect. The light-transmitting functional layer can be made of organic polarizer (POL) material. As a flexible organic material, POL material has good flexibility and stability, and can be evenly distributed in all areas, avoiding optical problems caused by the presence of a metal grid. Furthermore, POL material itself has excellent optical properties, effectively absorbing excess light and reducing reflection and scattering, thereby improving the overall transparency and display effect of the display panel.

[0045] In some exemplary embodiments, the filter unit may include: a first surface near the light-emitting substrate, a second surface away from the light-emitting substrate, and a sidewall connecting the first and second surfaces. The orthographic projection of the first surface onto the light-emitting substrate includes the orthographic projections of the second surface and the sidewall onto the light-emitting substrate. In other words, the angle between the sidewall of the filter unit and the first surface may be less than or equal to 90 degrees. This example, by optimizing the angle between the sidewall of the filter unit and the first surface, can reduce light loss, adjust brightness attenuation (L-decay), and color shift unevenness, thereby improving the brightness uniformity, color shift symmetry, and overall color consistency of the display panel.

[0046] In some exemplary embodiments, within a first cross-section perpendicular to the plane of the light-emitting substrate, the sidewall of at least one filter unit includes: a first sidewall and a second sidewall connecting a first surface and a second surface. The first sidewall and the first surface have a first included angle, and the second sidewall and the first surface have a second included angle. The first included angle may be greater than or equal to the second included angle. In some examples, the first cross-section may pass through the geometric center of the filter unit. For example, within the first cross-section, the cross-sectional shape of the filter unit may be a regular trapezoid. This example, by adjusting the included angle between the sidewall and the first surface, can help reduce brightness attenuation differences at different viewing angles and enhance the stability of the display effect.

[0047] In some exemplary embodiments, the thicknesses of the filter units with different transmitted colors can be at least partially the same, or all different; wherein, the thickness of the filter unit can be the minimum distance between the first and second surfaces of the filter unit. In some examples, the multiple filter units may include: a first filter unit that transmits red light, a second filter unit that transmits green light, and a third filter unit that transmits blue light; wherein, the thickness of the second filter unit can be less than the thickness of the first filter unit and less than the thickness of the third filter unit. This example, by differentiating the thicknesses of the filter units with different transmitted colors, can reduce the attenuation differences of different colors of light in the color filter layer, thereby reducing light loss and brightness attenuation, and enhancing the overall performance and color performance of the display panel.

[0048] The following examples illustrate the solution of this embodiment.

[0049] Figure 2 This is a planar schematic diagram of the color filter layer of a display panel according to at least one embodiment of the present disclosure. In some examples, the display panel may include a display area and a border area located on at least one side of the display area. Figure 2 As shown, the color filter layer may include multiple filter units located in the display area, such as a first filter unit 211, a second filter unit 212, and a third filter unit 213. The first filter unit 211, the second filter unit 212, and the third filter unit 213 may be periodically arranged within the display area of ​​the display panel. For example, in the direction from the bezel area to the display area, they may be arranged in the order of the first filter unit 211, the second filter unit 212, and the third filter unit 213 in each cycle. This embodiment does not limit the arrangement order of the multiple filter units in each cycle. For example, in the direction from the bezel area to the display area, they may be arranged in the order of the first filter unit, the third filter unit, and the second filter unit in each cycle.

[0050] In some examples, the first filter unit 211 can be a filter unit that only allows light of a first color (e.g., red light) to pass through (e.g., a red filter unit), the second filter unit 212 can be a filter unit that only allows light of a second color (e.g., green light) to pass through (e.g., a green filter unit), and the third filter unit 213 can be a filter unit that only allows light of a third color (e.g., blue light) to pass through (e.g., a blue filter unit). The light-emitting substrate can include multiple light-emitting elements that emit white light, and the multiple filter units can correspond to the multiple light-emitting elements, for example, in a one-to-one correspondence. The orthographic projection of one filter unit onto the light-emitting substrate can cover the orthographic projection of one light-emitting element onto the light-emitting substrate.

[0051] In some examples, the dimensions of multiple filter units may be the same. However, this disclosure is not limiting in this regard. In other examples, when the multiple filter units include a blue filter unit, a green filter unit, and a red filter unit, the size of the blue filter unit may be larger than the size of the red filter unit, the size of the red filter unit may be larger than the size of the green filter unit, or the size of the blue filter unit may be larger than the size of the green filter unit, and the size of the green filter unit may be equal to the size of the red filter unit. In this example, the size of the filter unit refers to the area of ​​the filter unit projected onto the light-emitting substrate.

[0052] In some examples, gaps may exist between adjacent filter units in a plurality of filter units. The edge of one filter unit may not be in contact with the edges of adjacent filter units. In other examples, the edges of adjacent filter units may be in direct contact.

[0053] In some examples, the orthographic projection of the filter unit onto the light-emitting substrate can be a hexagon. For example, the hexagon can have a first center line extending along a first direction D1 and a second center line extending along a second direction D2, and the intersection of the first and second center lines can be the geometric center of the hexagon. The first direction D1 and the second direction D2 can intersect, for example, they can be perpendicular to each other. The plane containing the first direction D1 and the second direction D2 can be parallel to the plane containing the light-emitting substrate. In other examples, the orthographic projection of the filter unit onto the light-emitting substrate can be a rectangle or other shapes. This embodiment is not limited in this respect.

[0054] Figure 3 for Figure 2 A partial cross-sectional view along the QQ' direction. Figure 3 The cross-sectional view shown can be a schematic diagram of the first cross-section passing through the geometric center point of the first filter unit 211, the second filter unit 212 and the third filter unit 213. Figure 3 The dashed arrow in the image indicates the direction of light on the display panel.

[0055] In some examples, such as Figure 3As shown, in a plane perpendicular to the display panel, the display panel may include: a light-emitting substrate 10, a color filter layer 21 located on the light-emitting side of the light-emitting substrate 10, a light-transmitting functional layer 31, and a light-absorbing layer 32. The color filter layer 21, the light-transmitting functional layer 31, and the light-absorbing layer 32 may be arranged sequentially along a direction away from the light-emitting substrate 10. The light-transmitting functional layer 31 may cover the surface of the multiple filter units of the color filter layer 21 away from the light-emitting substrate 10. The orthographic projection of the light-transmitting functional layer 31 onto the light-emitting substrate 10 may cover the orthographic projection of the multiple filter units of the color filter layer 21 onto the light-emitting substrate 10; the orthographic projection of the light-absorbing layer 32 onto the light-emitting substrate 10 may be located within the range of the orthographic projection of the light-transmitting functional layer 31 onto the light-emitting substrate 10. The light-absorbing layer 32 may cover the gap between two adjacent filter units.

[0056] In some examples, such as Figure 3 As shown, a single filter unit may include: a first surface near the light-emitting substrate 10, a second surface away from the light-emitting substrate 10, and a sidewall connecting the first surface and the second surface. Taking the second filter unit 212 as an example, the second filter unit 212 may include a first surface 2121, a second surface 2122, and a sidewall 2123 connecting the first surface 2121 and the second surface 2122. The first surface 2121 may be in contact with the light-emitting substrate 10; the orthographic projection of the second surface 2122 onto the light-emitting substrate 10 may be within the orthographic projection range of the first surface 2121 onto the light-emitting substrate 10. The orthographic projection of the sidewall 2123 onto the light-emitting substrate 10 may be approximately a ring structure, such as a hexagonal ring. The orthographic projection of the sidewall 2123 onto the light-emitting substrate 10 may be within the orthographic projection range of the first surface 2121 onto the light-emitting substrate 10. For example, the orthographic projections of the second surface 2122 and the sidewall 2123 onto the light-emitting substrate 10 may coincide with the orthographic projection of the first surface 2121 onto the light-emitting substrate 10. For example, the first surface 2121 and the second surface 2122 can be parallel to each other.

[0057] In some examples, the light-transmitting functional layer 31 can directly contact the first surface and sidewalls of the filter unit and cover the gap between adjacent filter units. The orthographic projection of the light-transmitting functional layer 31 onto the light-emitting substrate 10 can cover the orthographic projection of the color filter layer 21 onto the light-emitting substrate 10. The orthographic projection of the light-absorbing layer 32 onto the light-emitting substrate 10 can partially overlap with the orthographic projection of the light-transmitting functional layer 31 onto the light-emitting substrate 10. The orthographic projection of the light-absorbing layer 32 onto the first surface of the filter unit onto the light-emitting substrate 10 may not overlap, and the orthographic projection of the light-absorbing layer 32 onto the sidewalls of the filter unit onto the light-emitting substrate 10 may partially overlap, or may not overlap at all. The light-absorbing layer 32 can be disposed within the gap between the filter units.

[0058] In some examples, the material of the light-transmitting functional layer 31 can be an organic material with a polarizing effect; the material of the light-absorbing layer 32 can be an organic material with a light-absorbing effect. For example, the light-transmitting functional layer can be configured to allow light emitted from the light-emitting substrate to pass through and reflect light incident on the color filter layer from the side away from the light-emitting substrate. The light-transmitting functional layer 31 and the light-absorbing layer 32 can be prepared by a spin-coating process. In some examples, the material of the light-transmitting functional layer 31 can include at least one of the following: organic phosphorescent gain material (OPL) and organic phosphorescent emitting material (OPE). The organic phosphorescent gain material (OPL) can include Nile red used in blue OLEDs, which can block non-dominant color light (such as red and green light), thereby reducing blue light crosstalk. The organic phosphorescent emitting material (OPE) can emit dominant color light (such as blue light), thereby reducing light leakage of other colors. In some examples, the material of the light-absorbing layer 32 can include at least one of the following: conjugated organic polymer (COP) and blue organic light-emitting diode material. Conjugated organic polymers can absorb excess colored light (such as blue light), reducing the amount of excess colored light reflected to the eyes and thus reducing light leakage. Blue organic light-emitting diode materials themselves have a high light absorption rate, which can effectively absorb excess light and reduce light leakage.

[0059] This example demonstrates how adding a light-transmitting layer to the color filter layer enhances the light-blocking effect, providing an extra layer of protection. This effectively reduces light leakage caused by tiny gaps, ensuring that the filter units are not affected by neighboring filter units that transmit different colors of light, thereby improving overall color accuracy. Furthermore, the light-transmitting layer provides physical protection to the color filter layer, preventing damage from external factors such as contamination and scratches, improving material durability and extending the lifespan of the display panel. Additionally, by adding a light-absorbing layer with specific light absorption characteristics, non-target wavelengths of light can be effectively absorbed, further enhancing color performance. This not only improves the display's color richness but also enhances the viewing experience.

[0060] In some examples, the thickness of a filter unit can refer to the minimum distance between the first and second surfaces of the filter unit. For example, the thickness of the first filter unit 211 can be h1, the thickness of the second filter unit 212 can be h2, and the thickness of the third filter unit 213 can be h3. In this example, h1, h2, and h3 can be the same.

[0061] In some examples, within the first cross-section, the sidewall 2123 of the second filter unit 212 may include a first sidewall 2123a and a second sidewall 2123b. The first sidewall 2123a may be adjacent to the first filter unit 211, and the second sidewall 2123b may be adjacent to the third filter unit 213. The first sidewall 2123a may have a first included angle α21 with the first surface 2121, and the second sidewall 2123b may have a second included angle α22 with the first surface 2121. The first included angle α21 and the second included angle α22 may be the same, for example, both may be less than 90 degrees, such as 60 degrees or 45 degrees. The cross-sectional shape of the second filter unit 212 may be, for example, a regular trapezoid. The cross-sectional shapes of the first filter unit 211 and the third filter unit 213 in this example are similar, so they will not be described again here.

[0062] Figure 3 The dashed line in the diagram illustrates the emitted light from the second filter unit 212. The green light passing through the sidewall 2123 of the second filter unit 212 illuminates the adjacent first filter unit 211 and third filter unit 213. Since the light-transmitting functional layer 31 covers the first and third filter units 211 and 213, the green light does not pass through them. Instead, it is reflected or refracted on the light-transmitting functional layer 31 covering the first and third filter units 211 and 213, causing the green light to exit from above the second filter unit 212, thereby reducing the light loss of the second filter unit 212. The light-absorbing layer 32 disposed between adjacent filter units can absorb light incident on the filter unit from the outside, effectively blocking stray light.

[0063] In this example, by designing the angle between the sidewall of the filter unit and the first surface to be less than 90 degrees, the refraction and reflection of light can be optimized, effectively reducing light loss. Since the cross-sectional shape of the filter unit is a trapezoid, the thickness of the filter unit gradually decreases compared to when the angle between the sidewall and the first surface is 90 degrees. This reduces differences in light attenuation and color shift asymmetry at different viewing angles, thereby improving viewing angle performance. Because the trapezoidal structure helps to improve uneven brightness attenuation at large viewing angles, the brightness of the display panel is more consistent at different angles, thus improving the overall brightness uniformity of the display panel.

[0064] With technological advancements, LED sizes in some fields are shrinking, reaching the microLED range below 50 micrometers (µm). Micro-OLEDs (Micro Organic Light-Emitting Diodes) are microdisplays that have emerged in recent years, with silicon-based OLEDs being one type. Silicon-based OLEDs not only enable active pixel addressing but also allow for the fabrication of various functional circuits on silicon substrates, including timing control (TCON) circuits and overcurrent protection (OCP) circuits, which helps reduce system size and achieve lightweight design. Silicon-based OLEDs are fabricated using mature complementary metal-oxide-semiconductor (CMOS) integrated circuit technology, offering advantages such as small size, high resolution (PPI), and high refresh rate, and are widely used in near-eye displays for virtual reality (VR) and augmented reality (AR).

[0065] The following example uses a silicon-based OLED display panel for illustration.

[0066] Figure 4 This is a partial cross-sectional schematic diagram of a display panel according to at least one embodiment of the present disclosure. In some examples, such as... Figure 4 As shown, in the direction perpendicular to the display panel, the display panel may include: a light-emitting substrate 10, a color filter layer 21 located on the light-emitting side of the light-emitting substrate 10, a light-transmitting functional layer 31, a light-absorbing layer 32, a first filling layer 15, a lens layer 18, a second filling layer 16, and a cover plate 17.

[0067] In some examples, the light-emitting substrate 10 may include a driving backplane and a light-emitting structure disposed on the driving backplane. The driving backplane may be a silicon substrate 100, which may also be referred to as an IC wafer, and may integrate multiple pixel circuits that generate driving signals, a gate driving circuit that generates gate driving signals, and a data driving circuit that generates data signals. The light-emitting structure may include a pixel definition layer 110 and multiple light-emitting elements, which may be electrically connected to the multiple pixel circuits. The light-emitting elements may include a first electrode 111, an organic light-emitting layer 112, and a second electrode 113. The first electrode 11 may be connected to the pixel circuits integrated within the silicon substrate 100. The organic light-emitting layer 12 may be sandwiched between the first electrode 111 and the second electrode 113. The first electrode 111 may be an anode, and the second electrode 113 may be a cathode. The pixel definition layer 110 may have multiple pixel openings in the display area, and the organic light-emitting layer 112 of the light-emitting element may contact the surface of the first electrode 111 exposed by the pixel openings. The first electrode 111 and the second electrode 113 may be made of metallic materials.

[0068] In some examples, the light-emitting substrate 10 may further include an encapsulation structure layer 121 located on the side of the light-emitting structure away from the silicon substrate 100. For example, the encapsulation structure layer 121 may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked together. The first and third encapsulation layers may be made of inorganic materials, the second encapsulation layer may be made of organic materials, and the second encapsulation layer may be disposed between the first and third encapsulation layers to prevent external moisture from entering the light-emitting element. However, this embodiment is not limited to this. For example, the encapsulation structure layer may employ a five-layer stacked structure of inorganic / organic / inorganic / organic / inorganic.

[0069] In some examples, the light-emitting substrate 10 may further include a planarization layer 122 located on the side of the encapsulation structure layer 121 away from the silicon substrate 100. A color filter layer 21 may be disposed on the planarization layer 122. The orthographic projection of a single filter unit of the color filter layer 21 onto the silicon substrate 100 may cover the orthographic projection of a light-emitting element onto the silicon substrate 100. For example, the light-emitting element of the light-emitting substrate 10 may be configured to emit white light.

[0070] In some examples, the lens layer 18 may include a plurality of lens units 181. The plurality of lens units 181 may be arranged in an array. The orthographic projection of one lens unit 181 onto the light-emitting substrate 10 may overlap with the orthographic projection of at least one filter unit onto the light-emitting substrate 10. For example, the orthographic projection of one lens unit 181 onto the light-emitting substrate 10 may at least partially overlap with the orthographic projection of one filter unit onto the light-emitting substrate 10. For instance, the orthographic projection of one lens unit 181 onto the light-emitting substrate 10 may be located within the orthographic projection range of one filter unit onto the light-emitting substrate 10.

[0071] In some examples, lens unit 181 can be a convex lens protruding away from the light-emitting substrate 10. A convex lens is made based on the principle of light refraction and is thicker in the center and thinner at the edges. A convex lens has the function of converging light rays. Lens unit 311 can include a third surface near the light-emitting substrate 10 and a fourth surface away from the light-emitting substrate 10. The third surface can be approximately planar, and the fourth surface can be approximately curved. The orthographic projection of the fourth surface onto the light-emitting substrate 10 can be located within the orthographic projection range of the third surface onto the light-emitting substrate 10, or it can coincide with the orthographic projection of the third surface onto the light-emitting substrate 10. Light rays emitted from the color filter layer 21 can be converged by sequentially passing through the third and fourth surfaces of lens unit 181. There are gaps between adjacent lens units; in other words, adjacent lens units may not be in direct contact.

[0072] The display panel of this example, by providing a light-transmitting functional layer 31 in the filter unit and its gaps, and a light-absorbing layer 32 in the gaps of the filter unit, can effectively block stray light, reduce color crosstalk, and thus improve the color purity of the image. It can further reduce light leakage through the gaps in the color filter layer, improving the color accuracy and brightness uniformity of the display panel. Further descriptions of the display panel of this example can be found in the descriptions of the foregoing embodiments, and will not be repeated here.

[0073] In other examples, the light-emitting substrate can be an OLED substrate. The light-emitting substrate can include a base, and circuit structures, light-emitting structures, and encapsulation structures sequentially disposed on the base. For example, the base can be a rigid base, such as a glass base; or it can be a flexible base, such as one made of an insulating material like resin. In other examples, the base can be a single-layer or multi-layer structure. When the base is a multi-layer structure, inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride can be disposed as a single layer or multiple layers between the layers. In some examples, the circuit structure can include: a semiconductor layer disposed on the base, a gate metal layer (e.g., including a first gate metal layer and a second gate metal layer), and a source / drain metal layer (e.g., including two or more source / drain metal layers). An insulating layer can be disposed between the semiconductor layer and adjacent metal layers. An insulating layer can be disposed between adjacent metal layers. The gate metal layer and source / drain metal layer can be made of metallic materials, such as any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo), or alloys of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb). They can be single-layer structures or multi-layer composite structures, such as Ti / Al / Ti. The semiconductor layer can be made of amorphous indium gallium zinc oxide (a-IGZO), zinc oxynitride (ZnON), indium zinc tin oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene, or polythiophene, etc. That is, this disclosure applies to transistors manufactured based on oxide technology, silicon technology, or organic technology. In some examples, the light-emitting structure layer may include a pixel definition layer and multiple light-emitting elements. For example, each light-emitting element may include a stacked first electrode, an organic light-emitting layer, and a second electrode. The first electrode of the light-emitting element can be an anode, and the first electrode can be electrically connected to the corresponding pixel circuit. A pixel definition layer can be disposed on the first electrode. The pixel definition layer can have multiple pixel openings, each pixel opening exposing at least a portion of the surface of a corresponding first electrode. At least a portion of the organic light-emitting layer can be disposed within a pixel opening and connected to the corresponding first electrode 131. The second electrode can be a cathode, disposed on the organic light-emitting layer, and in contact with the organic light-emitting layer. Driven by the first and second electrodes, the organic light-emitting layer can emit light of a corresponding color. An isolation pillar layer can also be disposed on the side of the pixel definition layer away from the substrate. The isolation pillar layer can include multiple isolation pillars (PS).In some examples, the organic light-emitting layer of the light-emitting element may include an emitting layer (EML) and one or more films selected from the following: a hole injection layer (HIL), a hole transport layer (HTL), a hole block layer (HBL), an electron block layer (EBL), an electron injection layer (EIL), and an electron transport layer (ETL). Driven by the voltage of the first and second electrodes, the light-emitting properties of the organic material can be utilized to emit light at the required grayscale.

[0074] Figure 5 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. In some examples, such as Figure 5 As shown, the thicknesses of the filter units of the color filter layer 21, which transmit different colors of light, can be partially different. The multiple filter units of the color filter layer 21 may include: a first filter unit 211 that transmits red light, a second filter unit 212 that transmits green light, and a third filter unit 213 that transmits blue light. The thickness h2 of the second filter unit 212 can be less than the thickness h1 of the first filter unit 211 and less than the thickness h3 of the third filter unit 213. The thickness h1 of the first filter unit 211 and the thickness h3 of the third filter unit 213 can be the same.

[0075] In some examples, within the first cross-section, the angle between the sidewall of the second filter unit 212 and the first surface can be smaller than the angle between the sidewall of the first filter unit 211 and the first surface, and smaller than the angle between the sidewall of the third filter unit 213 and the first surface. Specifically, the first angle a21 between the first sidewall of the second filter unit 212 and the first surface, and the second angle a22 between the second sidewall of the second filter unit 212 and the first surface, can be of the same magnitude.

[0076] In some examples, color asymmetry is often due to uneven thickness of the color filter layer, leading to differences in the attenuation of different colors of light. This example reduces color asymmetry by thinning the filter unit, thereby reducing the attenuation differences of different colors of light within the color filter layer. In this example, thinning the second filter unit 212 reduces excessive attenuation of the green component, resulting in more uniform color; moreover, a thinner second filter unit 212 reduces green light attenuation, allowing more green light to pass through, thus improving overall brightness. This example helps alleviate brightness attenuation and improves the brightness uniformity of the display panel. Further descriptions of the display panel in this example can be found in the descriptions of the foregoing embodiments and will not be repeated here.

[0077] Figure 6 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. In some examples, such as Figure 6 As shown, the angle between the sidewall of the second filter unit 212 and the first surface (e.g., the second angle a22) can be 90 degrees, and the angle between the sidewall of the third filter unit 213 and the first surface can be 90 degrees.

[0078] In some examples, when the angle between the sidewall of the filter unit and the first surface is a right angle, light will pass directly through the sidewall of the filter unit and refract at the right angle. This may cause the light to refract back and forth between adjacent filter units, resulting in color distortion. Covering the filter unit with a light-transmitting functional layer 31 may cause more light reflection and refraction, thereby increasing light loss and attenuation, and thus reducing brightness. In addition, the color gamut may be narrowed due to uneven refraction. For example, when the display panel's display effect is bluish, the angle between the sidewall of the third filter unit that transmits blue light and the first surface can be set to 90 degrees, making the refraction path of light in the color filter layer uneven, increasing the loss and attenuation of blue light, thereby reducing color shift and improving the bluish display effect.

[0079] This example optimizes the angle between the sidewall of the filter unit and the first surface to a right angle, allowing light to pass directly through the sidewalls of these filter units and refract back and forth between the sidewalls of adjacent filter units. This increases the loss of light transmitted through the filter units and reduces brightness, which can improve the color shift phenomenon present in the display panel to a certain extent and is beneficial to the color uniformity of the entire display panel. Further descriptions of the display panel in this example can be found in the description of the foregoing embodiments.

[0080] Figure 7 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. In some examples, such as Figure 7As shown, the multiple filter units of the color filter layer 21 may include: a first filter unit 211 that transmits red light, a second filter unit 212 that transmits green light, and a third filter unit 213 that transmits blue light. The sidewall of the first filter unit 211 and the first surface may have a first included angle a11 close to the second filter unit 212 and a second included angle a12 away from the second filter unit 212; the second filter unit 212 may have a first included angle a21 close to the first filter unit 211 and a second included angle a22 close to the third filter unit 213; the third filter unit 213 may have a first included angle a31 close to the second filter unit 212 and a second included angle a32 away from the second filter unit 212. The second included angle a12 of the first filter unit 211 and the second included angle a32 of the third filter unit 213 can be less than 90 degrees, while the first included angle a11 of the first filter unit 211, the first included angle a31 of the third filter unit 213, and the first included angle a21 and the second included angle a22 of the second filter unit 212 can all be 90 degrees. This example can improve the greenish display effect by increasing the loss and attenuation of green light.

[0081] In this example, by setting the angle between the sidewalls of some filter units and the first surface to right angles, light passes directly through the sidewalls of these filter units and refracts back and forth between the sidewalls of adjacent filter units, increasing the loss of light transmitted through these filter units and reducing brightness. By setting the angle between the sidewalls of other filter units and the first surface to less than 90 degrees, light can be refracted through the sidewalls of these filter units, allowing for a smooth adjustment of the light path. This method can reduce the non-uniformity of brightness and color, thereby improving brightness attenuation and color shift symmetry to some extent.

[0082] Figure 8 This is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. In some examples, such as Figure 8As shown, the multiple filter units of the color filter layer 21 may include: a first filter unit 211 that transmits red light, a second filter unit 212 that transmits green light, and a third filter unit 213 that transmits blue light. The light-transmitting functional layer 31 may not be in contact with the second surface (e.g., second surface 2122) of the filter unit on the side away from the light-emitting substrate 10. The light-transmitting functional layer 31 may cover the sidewalls of the filter unit. In this way, an effective barrier can be formed on the sidewalls of the filter unit, blocking stray light from adjacent filter units. The light blocking of the sidewalls can effectively reduce cross-interference of light, ensuring that the colors of the light transmitted by different filter units are purer, thereby improving image quality. Since light mainly propagates in the vertical direction of the first surface (e.g., first surface 2121) of the filter unit, the design of the sidewalls of the filter unit does not affect the main propagation path of light, but can provide necessary light blocking at key locations, ensuring color purity and accuracy, and reducing color deviation caused by light mixing. Compared to coating the entire surface of the filter unit with a light-transmitting functional layer, sidewall coating significantly reduces material consumption, simplifies the manufacturing process, improves production efficiency, and thus reduces overall costs. Further descriptions of the display panel in this example can be found in the foregoing description of the embodiments, and will not be repeated here.

[0083] This embodiment also provides a display panel, including: a light-emitting substrate and a color filter layer disposed on the light-emitting side of the light-emitting substrate. The color filter layer includes a plurality of filter units, each filter unit including: a first surface close to the light-emitting substrate, a second surface away from the light-emitting substrate, and a sidewall connecting the first surface and the second surface. The angle between the sidewall and the first surface is less than or equal to 90 degrees. The filter units with different light-transmitting colors have at least partially the same thickness, or all different thicknesses. The thickness of each filter unit is the minimum distance between the first surface and the second surface of the filter unit.

[0084] The display panel in this embodiment reduces the attenuation differences of different colors of light in the color filter layer by differently designing the thickness of the filter units that transmit different colors, thereby reducing light loss and brightness attenuation, and enhancing the overall performance and color performance of the display panel.

[0085] In some exemplary embodiments, the multiple filter units of the color filter layer include: a first filter unit that transmits red light, a second filter unit that transmits green light, and a third filter unit that transmits blue light; the thickness of the second filter unit is less than the thickness of the first filter unit and less than the thickness of the third filter unit.

[0086] In some exemplary embodiments, within a first cross-section perpendicular to the plane of the light-emitting substrate, the sidewall of at least one filter unit includes: a first sidewall and a second sidewall connecting the first surface and the second surface. The first sidewall and the first surface have a first angle, and the second sidewall and the first surface have a second angle, wherein the first angle is greater than or equal to the second angle. This example, by adjusting the angle between the sidewall and the first surface, can help reduce brightness attenuation differences at different viewing angles and enhance the stability of the display effect.

[0087] Further descriptions of the display panel in this example can be found in the description of the foregoing embodiments, and will not be repeated here.

[0088] Figure 9 This is a schematic diagram of a display device according to at least one embodiment of the present disclosure. In some examples, such as... Figure 9 As shown, the display device 91 may include a display panel 910. The display panel 910 may be a Micro-LED display panel or a Mini-LED display panel. The display device 91 may be a product with image (including static images or dynamic images, where dynamic images may be video) display capabilities, such as products that can be applied to in-vehicle displays, vehicle lights, vehicle windows, shopping mall displays, augmented reality (AR) devices, virtual reality (VR) devices, etc. However, this embodiment is not limited in this respect.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A display panel, characterized in that, include: Light-emitting substrate; A color filter layer is disposed on the light-emitting side of the light-emitting substrate and includes multiple filter units; A light-transmitting functional layer is located on the surface of the color filter layer away from the light-emitting substrate, and the orthographic projection of the light-transmitting functional layer on the light-emitting substrate at least partially overlaps with the orthographic projection of at least one filter unit on the light-emitting substrate. A light-absorbing layer is located on the surface of the light-transmitting functional layer on the side away from the color filter layer, and the light-absorbing layer covers the gap between at least two adjacent filter units.

2. The display panel according to claim 1, characterized in that, The light-transmitting functional layer is disposed within the groove formed by the interval between adjacent filter units of the color filter layer.

3. The display panel according to claim 1, characterized in that, The light-absorbing layer is projected onto the light-emitting substrate within the projection range of the light-transmitting functional layer onto the light-emitting substrate.

4. The display panel according to claim 1, characterized in that, The at least one filter unit includes: a first surface close to the light-emitting substrate, a second surface away from the light-emitting substrate, and a sidewall connected between the first surface and the second surface, wherein the orthographic projection of the first surface onto the light-emitting substrate includes the orthographic projections of the second surface and the sidewall onto the light-emitting substrate.

5. The display panel according to claim 4, characterized in that, The projection of the light-absorbing layer onto the light-emitting substrate does not overlap with the projection of the second surface of the at least one filter unit onto the light-emitting substrate.

6. The display panel according to claim 4, characterized in that, The light-transmitting functional layer is not in contact with the second surface of the at least one filter unit.

7. The display panel according to claim 4, characterized in that, The light-transmitting functional layer covers the second surface and sidewalls of the at least one filter unit.

8. The display panel according to claim 4, characterized in that, In a first cross-section perpendicular to the plane where the light-emitting substrate is located, the sidewall of the at least one filter unit includes: a first sidewall and a second sidewall connecting the first surface and the second surface, the first sidewall having a first angle with the first surface, the second sidewall having a second angle with the first surface, and the first angle being greater than or equal to the second angle.

9. The display panel according to claim 8, characterized in that, The first profile passes through the geometric center of the at least one filter unit.

10. The display panel according to claim 8, characterized in that, At least one of the first included angle and the second included angle is 90 degrees.

11. The display panel according to claim 8, characterized in that, The thicknesses of the filter units with different light transmission colors are at least partially the same, or all different; the thickness of the filter unit is the minimum distance between the first surface and the second surface of the filter unit.

12. The display panel according to claim 11, characterized in that, The plurality of filter units include: a first filter unit that transmits red light, a second filter unit that transmits green light, and a third filter unit that transmits blue light; the thickness of the second filter unit is less than the thickness of the first filter unit and less than the thickness of the third filter unit.

13. The display panel according to claim 12, characterized in that, The first included angle of the first filter unit and the first included angle of the third filter unit are close to the second filter unit, and the first included angle of the second filter unit is the same as the second included angle of the second filter unit.

14. The display panel according to any one of claims 1 to 13, characterized in that, The display panel further includes a lens layer located on the side of the light absorption layer away from the light transmission functional layer. The lens layer includes a plurality of lens units, and the orthogonal projection of at least one of the plurality of lens units onto the light-emitting substrate overlaps with the orthogonal projection of at least one of the filter units onto the light-emitting substrate.

15. The display panel according to any one of claims 1 to 14, characterized in that, The light-emitting substrate includes: a driving backplate and a plurality of light-emitting elements; the plurality of light-emitting elements are located between the driving backplate and the color filter layer; the orthographic projection of a light-emitting element on the driving backplate overlaps with the orthographic projection of a filter unit on the driving backplate.

16. The display panel according to claim 15, characterized in that, The driving backplane is a silicon-based substrate that integrates multiple pixel circuits, and the multiple pixel circuits are electrically connected to the multiple light-emitting elements.

17. The display panel according to claim 1, characterized in that, The material of the light-transmitting functional layer includes at least one of the following: organic phosphorescent gain material, organic phosphorescent emitting material; the material of the light-absorbing layer includes at least one of the following: conjugated organic polymer, blue organic light-emitting diode material.

18. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 17.

19. A display panel, characterized in that, include: Light-emitting substrate; A color filter layer is disposed on the light-emitting side of the light-emitting substrate and includes multiple filter units. Each filter unit includes a first surface close to the light-emitting substrate, a second surface away from the light-emitting substrate, and a sidewall connecting the first surface and the second surface. The angle between the sidewall and the first surface is less than or equal to 90 degrees. The thicknesses of filter units with different light-transmitting colors are at least partially the same or all different. The thickness of each filter unit is the minimum distance between the first surface and the second surface of the filter unit.

20. The display panel according to claim 19, characterized in that, The plurality of filter units include: a first filter unit that transmits red light, a second filter unit that transmits green light, and a third filter unit that transmits blue light; the thickness of the second filter unit is less than the thickness of the first filter unit and less than the thickness of the third filter unit.

21. The display panel according to claim 19, characterized in that, In a first cross-section perpendicular to the plane of the light-emitting substrate, the sidewall of at least one filter unit includes: a first sidewall and a second sidewall connecting the first surface and the second surface, the first sidewall having a first angle with the first surface, the second sidewall having a second angle with the first surface, and the first angle being greater than or equal to the second angle.

Images